So the other day i was going for a little drive. when warming up the drivers info center tells me "LOW OIL PRESSURE" "TURN OFF ENGINE"and i look into it at the dealer and theres a bulliten saying there is a concern about faulty relieve valve inside the oil pump that means no oil to the top of the motor, thank my lucky stars that i was at home and did'nt drive or run to long without oil.G.M has not come out with a revised part# for this fix so i bought a standard volume /high pressure pump from MELLING and all is well. Don't have the T.S.B. # here at home. if you can't find i'll post it up when i get to the shop.

Dec 14th '09 Lot of other chevrolets in this TSB(corvette,camaro,trucks and suv's)but i was one of the lucky ones that had the condtion and caught it in time to save the motor. had to service it myself because of all the Mods, Cam,Heads,exhaust. oh well my new hot rod right. it's only money$$$$$$$$$$$$$$$

not sure thats true. they should have still done the TSB for you... If its a known issue (flaw) it shoud be covered regardless of mods. For example, if your tail shaft fails, you get a new tranny no matter what mods you have done b/c the part is a known issue...

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:

Some customers may complain of low oil pressure, no oil pressure, and/or engine noise, which may be the result of a sticking oil pump pressure relief valve. In some instances, this may occur intermittently if the valve frees up when the engine cools down.
Recommendation/Instructions:

Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

The pump is approx $120 aftermarket, but any idea the price of labor or amount work needed if a person did it themselves. In the last year I just made the warranty on the stepper motor going out on my silverado's speedometer, then spent $600 twice replacing the lim gasket on a 2001 lumina and grand am. Kinda getting tired of spending money on problems gm knows about. $600 is easier to spend than lose the original motor that came with it.

not sure thats true. they should have still done the TSB for you... If its a known issue (flaw) it shoud be covered regardless of mods. For example, if your tail shaft fails, you get a new tranny no matter what mods you have done b/c the part is a known issue...

ha ha they are still trying to deny mine output shaft for like two weeks!

Does anyone know what the VIN range of the affected cars is, or is this an across the board concern?

I don't know the range but I can tell you mine appears to fall in it and my VIN is 7470. This past weekend I noticed my oil pressure dropped to just above the the zero mark on the oil pressure gauge on the 4-pack while idling. At cruising speed it still only registers ~ 25 pounds. I carried it by the dealer today and they said did you get a low oil light come on and I replied no and he said it is probably nothing then. I told them it is either low pressure or a bad gauge, I don't know which it is but they are going to fix it.

We talked to a GM tech and he said a TEMPORARY FIX: Fire the Car up and DEAD REV it to get the Oil Pressure to UN-Stick the plunger. If the oil pressure comes back, you should drive the car Home, or to your local dealer as it will probably/WILL get stuck again.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
<A href="#ss1-2435251">Condition/Concern:

Some customers may complain of a low oil pressure message/light on the dash and a technician may find a P0521 DTC in the ECM.
<A href="#ss2-2435251">Recommendation/Instructions:

If this concern is encountered, follow SI diagnosis. If it indicates that the Tech 2 oil pressure parameter is low but proper oil pressure is present at the oil filter housing, inspect the Valve Lifter Oil Filter for debris/sludge that could be restricting oil flow to the oil pressure sensor before replacing any parts.
Follow the Valve Lifter Oil Filter Removal and Installation Procedure to remove the filter for inspection. If the filter is plugged, it can normally be cleaned with brake/contact cleaner and light shop air. If it cannot be cleaned for some reason, replace it using the part number listed in the parts catalog. Do not replace the complete Valve Lifter Oil Manifold just because the filter is plugged.#452 - Valve Lifter Oil Filter

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.